Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfed3b078be46ea7…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 07:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0ba407d76f5b5dbe0d5eb11062d1280 SHA-1: cae9e9f84c617ac64f0c63412c778191a2d240ee SHA-256: cfed3b078be46ea77e4c88aa77eefc53b26a480e0f529ee85e40806214ae5583
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com and a redirector on ttraff.com. The primary malicious link identified is https://ttraff.com/pify?keyword=guitar+tab+perfect+pdf, which is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to guitar tabs and PDF, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=guitar+tab+perfect+pdf
    • http://kedelasa.jeddahstearoom.com/uploads/1/3/0/8/130874232/lufirogukelufirexino.pdf
    • http://files.wolvesdenranch.com/uploads/1/3/1/4/131411474/neneritowuve.pdf
    • http://nenaxuf.gracefarmtour.org/uploads/1/3/2/7/132740541/livonuretawunafop.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/sililexemonatotukurubeso.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/51307997428.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/37972409796.pdf
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/24372002534.pdf
    • https://cdn.shopify.com/s/files/1/0439/0486/0328/files/4145150632.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/likewukilufuvofabukifezo.pdf
    • https://cdn.shopify.com/s/files/1/0447/7042/7031/files/a_w_tozer_the_pursuit_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/automobile_ignition_system.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/4997741972.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/59156974590.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/19459967148.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/articulo_cientifico_de_metabolismo_de_proteinas.pdf
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/fimewunakim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a5e.bin
af909d7fbf9299951ae94854df51d19c6426fd0a8e2e8d388a98d4f33148fb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5E 4776 bytes
font_01_sfnt_off00006ab2.bin
5e3a24b81a33e047d08fc8574f64aa40c6bc05833c681f2783b336f388603931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB2 14136 bytes
font_02_sfnt_off00009718.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9718 4324 bytes

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